Can the LaCrosse 28T use 92 octane gasoline?

[MacJoanna]

The new generation LaCrosse 28T can use 92 octane gasoline. China's National V standard includes 89, 92, and 95 octane, with 98 octane listed in the appendix. Gasoline octane rating: This represents the ratio of the actual gasoline's anti-knock performance compared to standard gasoline. The higher the octane number, the stronger the anti-knock performance. Standard gasoline is composed of isooctane and n-heptane. Higher octane doesn't necessarily mean better - the appropriate gasoline grade should be selected based on the engine's compression ratio. Gasoline grade categories: Gasoline has a high octane number (anti-knock combustion performance) and is classified into grades such as 90, 93, 95, and 97 based on the octane value. Gasoline is produced by refining different gasoline components obtained from petroleum refining (including straight-run gasoline components, catalytic cracking gasoline components, catalytic reforming gasoline components, etc.) and blending them with high-octane components. It is mainly used as fuel for spark-ignition internal combustion engines in automobiles.

[SanLandon]

I've driven the Buick LaCrosse 28T for several years. As an auto enthusiast, using 92-octane gasoline isn't quite suitable, primarily because turbocharged engines typically require 95-octane or higher fuel to maintain stable operation. The lower octane rating of 92-octane fuel may cause engine knocking, which sounds like a knocking noise, and over time can wear out the cylinders and pistons. My experience is to stick with 95-octane fuel, as it provides smoother power response and faster acceleration. Saving on fuel doesn't necessarily mean saving money, as repairing knocking damage can be expensive. I recommend checking the owner's manual for confirmation; Buick's official recommendation is usually 95-octane or higher to protect engine longevity and avoid trouble.

[MacDakota]

I usually pay great attention to car maintenance, and for the LaCrosse 28T, using 92-octane gasoline poses high risks. The engine design requires higher-octane fuel to prevent knocking, as insufficient octane levels can easily cause issues and damage internal components. I carefully checked the manual, which clearly specifies the requirement for 95 or 98-octane fuel—no compromises. Long-term use of 92-octane may increase fuel consumption and even lead to malfunctions, doubling repair costs. It's safer and more reliable to follow the standards. Normally using 95-octane not only protects the car but also ensures peace of mind while driving.

[Adeline]

I tried using 92-octane fuel to save money, but it actually increased fuel consumption and caused noticeable engine shaking. In the long run, it's even less cost-effective. The LaCrosse 28T turbo engine has a high risk of knocking with lower-octane fuel, and the repair costs would be prohibitively expensive—not worth the trade-off. Using 95-octane fuel provides the best maintenance results, offering peace of mind and practicality.

[AidenFitz]

From a technical perspective, the LaCrosse 28T engine has a high compression ratio and requires 95 octane or higher gasoline to prevent knocking. Using 92 octane gasoline with insufficient octane rating may cause premature ignition and damage components. I referred to the manual and confirmed that it is not recommended. Occasionally using 92 octane in emergencies is acceptable, but long-term use can harm engine performance. Consistently using higher octane fuel is crucial for prolonging engine lifespan.